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Measures of Central Tendency and Dispersion

Mean, median, mode, range

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Medians
Teacher Contributed

RWA Medians

Topic

Acrobats

Vocabulary

  • median
  • centroid

Student Exploration

How do acrobats use the center of mass to balance? How is the center of mass related to the three medians of a triangle?

http://video.pbs.org/video/1607949294/

Centroid of a Triangle - The point where the three medians of the triangle intersect. The ‘center of gravity’ of the triangle

Read more here ... http://www.mathopenref.com/trianglecenters.html

http://www.shanghai-central.com/Chinese-Acrobatics.html

Extension Investigation

How to Balance a Triangle using a Centroid

Layering (optional)

Triangle Centroid By Folding

Constructing the Centroid of a Triangle

Patty paper centroid

Triangle Centroid

http://demonstrations.wolfram.com/TriangleCentroid/

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